feat: add activity on connection

[aygalinc]

Proposed Changes

Add activity on connection creation.
In case of creation exception register an error event.

Types of Changes

What types of changes does your code introduce to this project?
Put an x in the boxes that apply

• Bug fix (non-breaking change which fixes issue #NNNN)
• [X ] New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause an observable behavior change in existing systems)
• Documentation improvements (corrections, new content, etc)
• Cosmetic change (whitespace, formatting, etc)

Refer to #1731

[michaelklishin]

Please rename "rabbitmq connect" to "connection.open". It is obvious that this client will connect to a RabbitMQ node.

[aygalinc]

ok to rename but activity name is used in all UI when traces are ingested, I highly recommand to set a more human friendly name like "connection open"

[michaelklishin]

"connection open" (with a space) is not grammatically correct. "connection.open" is a protocol frame name but I can see how that'd be too obscure.

"connection attempt" can be used before we know that the connection succeeded. "connection opened" can be used after a successful connection. In fact, both can be used at the same time in different places.

[aygalinc]

"connection attempt" should be good because we do not know if its a success.
Span status will be set to ERROR and an exception event will be attached to the current span if it fails.